Clock controlled gas stove



Sept. 3, 1935. J. H. GRAYSON 2,013,239

CLOCK CONTROLLED GAS STOVE Filed March 6, 1931 4 s t -s t 1 Sept. 3, 1935. J. H. GRAYSON CLOCK CONTROLLED GAS STOVE Filed March 6, 1931 4 Sheets-$heet 2 Sept. 3, 1935. J. H. GRAYSON CLOCK CONTROLLED GAS STOVE Filed March 6, 1931 4 Sheets-Sheet 3 7 7, w Z J. 7 w 51% 9 2 3 X 9 T; M mm I Z M m W W MT.\ I .y m 1 m M fl /A Q 7 y a 7 c, "9 v 2% a 1 P I J. H. GRAYSON 2,013,239

CLOCK CONTROLLED GAS STOVE Filed March 6, 1951 4 Sheets-Sheet 4 Patented Sept. 3, 1935 7 CLOCK CONTROLLED GAS STOVE John H. Grayson, Lynwood, Calif., assignor to Grayson Heat Control, Inc., Lynwood,-Calif., a corporation of California Application March 6, 1931, Serial No. 520,726

10 Claims. (Cl. 161-9) This invention relates to clock controlled gas appliances generally, and is particularly concerned with gas ranges.

- Clock control mechanisms for use in connection with oven burners of gas ranges have been proposed in the past, but for various reasons have not been adopted to any large extent. .The principal objections were that they were too complicated and expensive, were not positive in operation, and were too apt to get out of order. It is, therefore, the principal object of. my invention to' provide a simple and inexpensive mechanism of the kind mentioned comprising a surprisingly small number of parts considering the operations 5- performed thereby, the mechanism .being easy to set and positive in its operation.

Another object of my invention is to combine the clock control mechanism with that of the oven regulator preferably in one compact assembly,

20 and in any event, whether the clock mechanism be made to form a part of a unitary assembly with the regulator or-not, have the clock so disposed on the stove and so connected with the mechanism cooperating with it that it serves as an ordinary 35 clock.

Still other objects are, first, to provide in connection with the clock control mechanism a manually operable means arranged when moved to a certain position to make the oven regulator 30 independent of the mechanism; second, to provide a by-pass on the regulator to keep the oven burner from being turned off completely by the regulator, and, third,,to provide preferably in connection with the aforesaid by-pass an auxiliary by-pass to 35 keep the burner at a low flame after the meal has been prepared under the automatic control of the clock mechanism and the latter has shut oil the gas, whereby to keep the food from getting cold before it is removed from the oven.

40 The invention is illustrated in the accompanying drawings, in which Figure 1 is a transverse vertical section through the oven section of a gas range showing the clock controlled oven regulator of. my invention installed 45 thereon;

Fig. 2 is a face view of the clock mechanism;

Fig. 3 is a vertical section through the clock control mechanism in a plane just behind the face plate so as to show the gearing which appears in 59 side elevation in Fig. 4;

Fig. 4 is a detail showing the regulator and clock control mechanism partly in side elevation and partly in central longitudinal vertical section;

Fig. 5 is a horizontal section on the line 5-5 of Fig. 4 on an enlarged scale;

Figs. 6 and 7 are views likeFigs. 2 and 3, but showing a different construction;

Fig. 8 is a view similar to Fig. 5, but showing a section on the line 8-8 of Fig. 6; v

Fig. 9 is a view similar to Figs. 2 and 6 showing 6 a still further modified construction;

Fig. 10 is a side view of Fig. 9 partly broken away to show the internal construction, and

Fig. 11 is a horizontal section on the line I I -l l of Fig. 9. 10

Similar reference numerals are applied to corresponding parts throughout the views.

I have illustrated the oven regulator I0 and clock control mechanism II, with which the present invention is particularly concerned, in con- 16 nection with the oven section I! of a gas range of conventional construction. A portion of the cooking top appears at l3, and the manifold M at the front of the cooking top has the usual oven cock, a portion of which appears at arranged 20 when opened to deliver gas to the oven burner l6 under the control of the oven regulator l0 and uating type, but, as a matter of convenience, it

may be assumed to be of the graduating type disclosed in my copending application, Serial No. 453,682, filed May 19, 1930, now Patent No. 1,862,183. In conformance with the disclosure in that application, I have shown a cast manifold ll disposed in the insulating chamber between the outer and inner side walls l8 and I9, respectively, of the oven, and having the cast valve body or control casing 20 of the regulator detachably secured to the upper end thereof and likewise disposed in said chamber. The lower end of the manifold is offset, as appears at 21, and reaches out through an opening provided in the 40 side wall 18 below the cooking top for connection with the mixing tube 22 of the burner it through the usual nipple 23 mounted on the manifold. Now, as fully described in said application, the manifold IT has two longitudinal passages cored therein, the upper ends of which appear at 24 and 25 in Fig. 5. The passage 24 has direct connection at its lower end with the oven cock l5 and with a pilot light 26 for the oven burner. The other passage 25 has communication at its lower end with the oven burner l6 through the nipple 23 and mixing tube 22. The control casing 20 of the oven regulator has the lower portion thereof of reduced thickness, as shown, and fastened to the upper end of the manifold I! by screws 21 which pass through registering holes in the casing 20 and manifold l1 and thread in holes 28 provided in the body 29 of the clock control mechanism ll. Now, as illustrated and described in the application above mentioned, there are two passages 24' and 25' provided in the control casing, as appears in Fig. 5. The passage 24' is placed in communication with the passage 24 through port 30 in the casing registering with port 3| in the manifold ll. The port 3| for a purpose later described is' defined by a valve seat ring 32. In a similar manner, the passage 25' is placed in communication with the passage 25 through a port 33 in the casing 20, and port 34 in the manifold l I defined by a valve seat ring 35. The passage 24' communicates with a chamber in the control casing 20 on one side of the valve therein, as described in said application, and the passage 25 communicates with a chamber on the other side of said valve. The valve is opened and closed under the control of a thermostat 36 projecting from the control casing 26 of the oven regulator into the oven, preferably crosswise of the top thereof, as shown. Thus, leaving out of consideration for the time being the clock control mechanism, that is, assuming that the oven regulator III is being used in the ordinary way, it is evident that when the oven cock I5 is turned on, gas is delivered through passage 24 to passage 24', and through the valve of the oven regulator to passage 25 and thence to passage 25 to the burner l6. If the oven is one equipped with an automatic lighter, the mere turning on of the gas takes care of the lighting of the burner. In the absence of an automatic oven lighter, the burner is, of course, lit in the usual way and the pilot light 26 is ignited and remains lit so long as the oven cock is-left open; thereby taking care of the lighting of the oven burner on each occasion of the opening of the oven regulator valve. It is customary to provide a bypass on the oven regulator to keep the burner from being shut oif entirely when the valve in the oven regulator closes, in order not to have to rely entirely upon the pilot light, and in order also to keep the oven closer to an even temperature. In keeping with the disclosure in my other application mentioned above, I provide a by-pass 31 between the passages 24 and 25' in the control casing, and have an adjustable screw-threaded plug 38 for regulating the flow through the by-pass. A look nut 39 threads on the projecting end of the plug 38 and serves when tightened to hold the plug in adjusted position. The oven regulator I0 and manifold l1 cooperating therewith are covered in the other application and do not form a part of the present invention, excepting only in so far as they form a part of the novel combination with the clock control mechanism II, which will now be described.

The body 29 of the clock control mechanism I l, as indicated above, is preferably mounted rigidly on the upper end of the manifold I! on the opposite side from the control casing 20 of the oven regulator I, thus making the regulator and clock control mechanism a compact unitary assembly with the manifold I1 and one which can be quickly and easily taken apart or put together.

Obviously, it is only necessary to remove the screws 21 to remove the regulator ID from the manifold from inside the oven and the mechanism ll from the manifold from outside the oven. It is true, however, that I provide a cover plate 26' arranged to have abutment with the outside of the oven wall and to be fastened to the casing removed before the control casing 20 can be withdrawn from the manifold I! from inside the oven. Gaskets are suitably interposed between the parts, as shown at'46 in Fig. 5, to prevent leakage of gas at the ports 3| and 34 previously mentioned,

and at the holes 4| and 42 provided in the oppo-- site wall of the manifold l1. These holes permit entry into the manifold II of valves 43 and 44 when the body 29 of the clock control mechanism II is being assembled on the manifold II. The valves are of a poppet type, and are in the form of discs slidably mounted on the reduced inner ends of stems 45 and 46, respectively, having a close working fit in parallel holes drilled horizontally through the body from end to end. Small heads 41, suitably provided by upsetting the reducedinner ends of the stems, serve to retain the valves thereon, and coiled compression springs 48 fitting about, the stems behind the valves and held in place by washers 48 serve normally to urge the valves toward engagement with the heads. The washers 49 have abutment with the annular shoulders defined at the reduced portions of the stems.v The outer ends of the stems 45 and 46 have knobs 56 and 5| provided thereon for setting purposes. Recesses 52 and 53 are counterbored in the body 29 about the outer ends of the stems 45 and 46, respectively. A coiled compression spring 54 in the recess 52 cooperates with a washer 55 on the stem 45 held in place by a pin 56 to urge the stem 45 normally outwardly and accordingly open the valve 43. In a similar manner, a coiled compression spring 51 in the recess 53 cooperates with a washer 56mm in place on the stem 46 by means of a pin 59, and tends normally to urge the stem inwardly to close the valve 44. Now, there is a dial plate 60 fastened as by means of screws 6| onto the front of the body'29, and the stems 45 and 46 project 1 through it through the centers of dials 62 and 63 printed or suitably impressed on the plate; The knobs 50 and 5| have pointers thereon, as indicated at 64, cooperating with the dials so that the knob 50, which is suitably marked On can be set at say 3:00 oclock P. M., as shown in Fig.2, and the knob 56, which is suitably marked OfP' can be set for another time, say 5:30 oclock P. M., whereby to determine the time for the gas to be turned on and off, as will presently appear. The front of the body 29 is recessed back of the plate 60, as appears at 65, for reception of two intermeshing gears 66 and 61 that are rotatable about or with respect to the stems; 45 and 46, respectively. The gear 66 has a circular flange 68 concentric therewith and free to turn in the recess-52. A longitudinalqsl'ot 6 9 is provided in this flange opening from theedge thereof. A pin 10 extends radially from the stem 45 and is arranged to engage the edge of the flange 68 so as to hold the stem 45 in depressed condition with the valve 43 closed, against the action of spring 54, until the gear 66'turns enough to bring the slot ,69 into register with the pin 10, where-.

upon the spring .54 causes the pin 10 to enter the slot and thestem 45 to accordingly move outwardly and open the valve 43. In a similar manner, a circular flange II is provided on the gear 61 concentric therewith, but projecting freely through a hole 12 in the dial plate 66. This flange has a longitudinal slot 13 provided therein opening from the edge thereof. A radial pin 14 on the stem 46 is arranged by engagement with the edge of the flange H to hold the stem 46 in extended position with the valve 44 opened, against the action of spring 51. Then when the gear 61 has turned far enough to bring the slot I3 into register with the pin 14, the spring 51 causes the stem 46 to move inwardly as the pin 14 enters the slot 13, thereby closing the valve 44. It will be observed that when the valves are closed there is enough movement of the stems for the valves to be held seated under pressure of their springs 48. See valve 43 in Fig. 5. This prevents leakage of gas.

The body 29 has a socket 15 provided therein preferably concentric with the dial 16 of the oven regulator for the sake of compactness and neatness in appearance. A clock 11 flts in the socket 15 with its winding and setting stem I8 projecting through a hole I9 provided therefor in the body. The clock has the usual dial plate and hour and minute hands 8| to cooperate therewith. The clock casing 82 has a slot 83 cut in the wall thereof registering with the recess 65 in the body. This permits a gear 84 mounted on a suitable post 85 in the clock casing 82 behind the dial plate 86 to project into the recess 65 and mesh with the gear 66. The gear 84 is driven by a gear 86 mountedon the tubular hour shaft 81 of the clock mechanism, that is, the same shaft carrying the hour hand. It is, therefore, evident that in the normal operation of the clock, the gear 86 turns the gear 84 and it in turn turns the gears 66 and 61. There is such slight resistance to the turning of the gears 66 and 67, which it will be seen are turned at the same speed as the gear 85 because of their 1:1 ratio driving connection with it, that the clock 11 keeps accurate time. The fact that the clock is mounted in the conspicuous position on the stove enables it to take the place of some other clock that would otherwise be required in the kitchen. While mention has been made of the use of a clock-requiring winding, it should, of course, be evident that an electric clock could be used if desired, so as to eliminate the objection that might otherwise be raised as to the housewife forgetting to wind the clock.

In operation, it should be evident from the foregoing description that it is only necessary to select the temperature desired by setting the dial 16 of the oven regulator-and setting the knobs 58 and 5| for the predetermined times at which the gas is to be turned on and turned off. In the example illustrated in Fig. 2, the housewife at 9:00 oclock A. M. has set the clock control mechanism II to automat cally turn on the gas for the oven l2 at 3:00 o'clock P. M. and turn it off again at 5:30 oclock P. M. This, therefore, makes the operation of the oven entirely automatic under the control of the mechanism II. If the clock is one equipped with an automatic lighter, there is, of course, no need to light a pilot such as the one shown at 26', because when the gas is turned on under the control of the mechanism I I, the automatic lighter will take care of the lighting of the oven burner l6. Where no automatic lighter is provided, it is, of course, necessary to light the pilot. In setting the knobs, the knob 50 must obviously be pressed in to bring the pin 16 out of the slot 69, whereupon the knob can be turned to the time desired. This, of

course, closes the valve 43. In setting the knob 5|, it is pulled out to bring the pin 14 out of the slot 13, whereupon the knob can be turned to the other time desired. This obviously opens the valve 44. Then, when the clock 11 comes around to the time for which the knob 58 has been set, the valve 43 opens in the manner previously described. This throws the oven into operation, and it is kept at whatever temperature the regulator dial I6 is set for. Then, later on, when the clock, after a predetermined period of operation of the oven, comes around to the time for which the knob 5| has been set, the

valve 44 is automatically closed to shut oi the gas. It is evident that the mechanism is of such simple construction, involving so few parts, that there is l ttle or no danger of the same failing to function properly or of its getting out of order. The construction furthermore can be manufactured at low cost, and permits of easy assembling and disassembling.

Attention is now called to Figs. 6 and 7. In the construction just described it must have been observed that the dial 62 is numbered clockwise like a clock dial, but that the dal 63 is numbered counterclockwise. The necessity for that arises out of the use of gears 66 and 61 of identical construction, and the fact that the said gears turn in opposite directions, the gear 66 clockwise and the gear 61 counterclockwise. In order to avoid the likelihood of confusion in the mind of the party setting the knobs, the construction disclosed in Figs. 6 and 7 has been devised providing two gears 66 and 61 of identical form both driven clockwise by means of a gear 84' driven off the gear 86 mounted on the hour shaft 81. This permits the dials 62' and 63' to be both numbered clockwise, so that the knobs 56' and 5| can both be set in the same way. In other words, the housewife in setting the mechanism does not have to bear in mind that the one dial is numbered clockwise and the other countermake the setting correctly.

In Fig. 8 I have shown a simple form of means whereby the oven regulator may be made independent of the clock mechanism at will, as for example, when it is desired to use the oven regulator in the old conventional way without danger of the clock mechanism cutting in and shutting off the gas. In other words, while the valve 43 can be opened by turning the knob 50 to the same reading as the clock 11, and will stay open, the valve 44 can be opened by pulling out the knob 5|, but will not stay open indefinitely, because as soon as the clock 11 comes around to the time for which the knob 5| is set, the valve 44 will close and thus turn off the oven burner. All that is required, therefore, is some means for holding the valve 44 open and to make it independent of the turning of the gear 61, or 61', as the case may be. I provide a plunger 98 slidably received in a hole 9| drilled crosswise through the body 29 in the plane of the stems 45 and 46. This plunger has a knob 92 on one end thereof for convenient hand operation, and has nuts 93 threaded on the other end to keep the same assembled in the body. The knob 92 limits movement inwardly and the nuts 93 outwardly. The plunger is slotted longitudinally almost the full length thereof, as indicated at 94, to permit the stems 45 and 46 to reach therethrough and allow endwise movement of' the plunger transversely relative to these stems. This arrangement, of course, keeps the plunger from clockwise, and will accordingly be more apt to turning, thereby insuring the proper relationship of the inclined cam surfaces 95 on the plunger relative to a washer 96 held in place on the stem 46 by a pin 91. The cam surfaces 95 form one end of a notch 98 formed in one side of the plunger. The notch 98 is deep enough so that when the plunger 90 is pulled out by means of the knob 92, the plunger 46 is free to move-far enough to close the valve 44. It is believed to be evident that the plunger 90 will normally be kept pulled out so long as the oven is being operated'with the clock control, but whenever it is desired to dispense with the clock' control and use the oven regulator in the conventional way, it is only necessary to press on the knob 92 to move the plunger 90 inwardly and hold the stem 46 extended with the radial pin 14 thereof clear of the edge of the flange 1|, and so that the stem cannot move under the action of the spring 51 when the slot I3 comes into register with the pin 14. In lighting the oven burner under such circumstances, it is clear that the valve 43 has to be opened by turning the knob 50 until the pin 10 drops into the slot 69, the valve being then kept open under action of the spring 54 and remaining open indefinitely.

In Fig. 8 I have also illustrated a hollow stud 99 providing the means for uniting the body 29 of the clock mechanism II with the manifold I1 and control casing 20 of the oven regulator I0. A nut I00, threaded onto the projecting end of the stud 99 from inside the oven, keeps the parts in assembled relation. A by-pass hole IN is drilled through the interfitting parts to establish communication between the passages 24 and 25' in the casing 20, the hole necessitated in this drilling operation being plugged, as indicated at I02. A screw threaded plug 38, corresponding to the plug 38 shown in Fig. 5, is threaded in the outer end of the stud 99 and serves to regulate the flow of gas through the by-pass hole. The gas by-passed keeps the oven burner from being extinguished when the oven regulator valve closes, as previously described. When the oven is operated with clock control, it is evident that the closing of the valve 44 at the predetermined time selected means complete extinguishment of the oven burner, owing to the fact that any gas delivered to the burner must be delivered through the passage 25, and when the valve 44 closes, the passage 25 is out 01f from communication with the passage 25' and is consequently also out 01f from communication with the bypass IOI. Now, I consider it desirable to keep the oven burner turned on with at least a low flame after the meal has been preparedjin 'accordance with the clock setting, so that the meal less of why the hole I03 is aslarge or larger than" the hole I the flow of gas is determined-by the setting of the plug 38'. That'is to say, the oven burner will be kept alight after closing of the valve 44 with the same sized flame as obtained when the oven regulator valve closes during the timed period of operation-of the oven. I prefer to provide a plug I threading as at I06 in the stud 99 at the opposite end from the plug 30 for closing the hole I03 whenever desired. This plug I05 is entered through a, hole drilled lengthwise through the body 29, and has a knob III on the front end thereof by means of which the same may be turned. A pointer I08 can be provided on the knob to indicate whether the plug I05 is in the on or ofi" position. If it is desired to dispense with the warming of the oven after the clock controlled period of operation, it is only necessary to turn theknob I01 clockwise to the o position. The pointer Ill can if desired be limited by engagement with stop pins I09 at the on" and off" positions to prevent one from turning the knob in the wrong position.

In Figs. 9-11 I have disclosed a construction in 'which the clock control is placed at a remote point with respect to the oven regulator and may, as a matter of fact, be entirely independent of a regulator and be used in connection with the cooking top burners or any gas burner on a stove or any other gas appliance, wherever time control for the turning on or off of the gas is desired. This mechanism may be mounted on the splasher back'wall of a gas range, as for example,

on the back'of the top shelf, or at any other point on the stove where the knobs for setting purposes will be conveniently accessible for 'manipulation, andwhere the clock can be easily seen to serve as a time piece for the kitchen. The body I08 of this mechanism houses the valves, and a separate body I09 is provided for the clock mechanism. The neck IIO, depending from the body I09, is for the delivery of gas, and the neck III for the discharge of gas, as indicated by the arrows. These necks communicate with chambers H0 and I I I-' in the valve body. A delivery valve 43' cooperates with a valve seat ring 32' provided on the body I06 to control the flow of gas from the chamber IIO into a connection II2 provided on the back of the body I08 for establishing communication between the chambers IIO' and III. A discharge valve 44' cooperates with a valve seat ring 35' on the connection II2 to control the, flow of gas from the connection I I2 into the chamber III'.

The delivery valve 43', as will soon appear, is

closed manually and arranged to be opened automatically ata predetermined time selected for the gas to be turned on, and this allows the flow of gas from the neck IIO to the neck III as is thought to be clear. Thereafter, the discharge valve 44', which is set manually in an open position to be closed at a predetermined time for the gas to be turned "01P, is arranged upon closing to stop the flow. Stems 45' and 46' are provided for setting the valves 43' and 44', respectively,

. and these have knobs 50' and 5| provided thereon having pointers to cooperate with dials 62' and 63', respectively. A spring 54 normally tends to open the delivery valve 43', and a spring 51' normally tends to close the discharge valve 44', and the valves are arranged to be set similarly as in the other cases described above, except that here it willbe seenthat both of the knobs will be pulled out in setting, instead of 'having the "on" knob pushed in and the on knob pulled out. The pins I0 and I4 provided for fastening theknobson their stems are ar-. ranged in thisconstruction tolserve as the point ers for the lm'obs'forcooperation'with the dials and alsohas the'detent pins foricooperation with the circular flanges 68' and 'll respectively,.of the gears I56 and 61'. Referring to-Fig.-9, it

- will be observed that the gears 66' and-161' are operated similarly as in 7 from the same gear 84' driven by gear 86 mountedon the hour shaft. It will no doubt be evident that it is quite an advantage to have the knobs arranged to be set in exactly the same way rather than to have them arranged so that one has to be pulled out and the other pushed in. Another advantage of this arrangement lies in the fact that it facilitates matters so far as regards the provision of friction locks for holding the stems against turning. It will be observed in Fig. 11 that I hav: prdvided leaf springs H3 and H4 mounted in the chambers H0 and Ill arranged to come into engagement with the serrated peripheries of collars H5 and H6, respectively, mounted on the stems and 46'. These collars incidentally serve as abutments for the springs 54' and 51', respectively, and when the stems are pulled out by means of their knobs, the collars are thrust against the springs H3 and H4, and this imposes a suflicient resistance to the turning of the stems with the gears 66' and 61' to insure the proper operation of the clock control mechanism such that the gas will be turned on definitely at a predetermined selected time, and off at another predetermined selected time. The arrangement is also such that when the delivery valve opens, the collar I I5 moves away from the spring H3, and the same is true with regard to the closing of the discharge valve, and in that way it is evident that whatever slight resistance to the operation of the clock may result from the locking of the collars H5 and H6 in the set positions of the stems is no longer imposed after the clock has performed its control functions and turned the gas on and off. That relieves the clock mechanism of any unnecessary burden during the long periods in which it will be operating without performing any control functions and be used simply as a time piece. In other words, there is no objection to the turning of the stems at any other time except when the knobs have been set, for controlling the turning V on and off of the gas to a certain burner or burners. V

7 It will be observed in passing that the clock body I09 is suitably detachably secured to the valve body I08 by means of lugs H! which project downwardly from the clock body on opposite sides of the valve body and have screws H8 therein to fasten the parts together. The gear 84' simply extends down through an opening in the top wall of the body for meshing engagement with the gears 66' and 61', as indicated in Fig. 10. This arrangement is of advantage in case the clock gets out of order and it is desired to replace the same, in which event a new unit can be substituted for the old without any difficulty whatever. It will also be observed in Fig. 11 that I have provided a means at H9 similar to the plunger for locking the discharge valve 44' in its open position. In this case the means is in the form of a slide operable by means of a button I20 and a small plate l2l visible through a window I22 in the front wall of the mechanism can be provided with a suitable marking to indicate the position of the knob I20 to show whether the valve mechanism is under the control of the clock or not.

It is believed the foregoing description conveys a clear understanding of all of the objects and advantages of my invention. The appended claims have been drawn with a view to covering all legitimate modifications and adaptations.

I claim:

1. In a fuel control device, a body having fuel delivery and discharge chambers, a pair of valves carried on stems slidably received in the body, the one valve controlling delivery of fuel, and the other controlling the discharge of fuel, spring means tending normally to open the delivery valve and close the discharge valve, detent pins on the valve stems for holding the delivery valve closed and the discharge valve opened against the action of said spring means, a pair of gears concentric with said stems and arranged to turn with respect thereto, the same having circular flanges concentric with said stems, and slots in said flanges opening from the edges thereof adapted to receive the detent pins when the slots are brought into register with the pins, knobs provided on the projecting ends of said stems for manually closing the delivery valve against the action of its spring means and setting its detent pin in a predetermined position with respect to its related slot and for opening the discharge valve against its spring means and setting its detent pin in a predetermined relation to the slot therefor, and timing means for simultaneously turning said gears at the same speed whereby to open the delivery valve at a predetermined time and subsequently close the discharge valve at another predetermined time.

2. A structure as set forth in claim -1 wherein the timing means comprises a clock arranged to operate continuously and having a numbered clock face and an hour shaft, the structure-including means providing a driving connection between the hour shaft of the clock and said gears to turn the latter at the same speed as the shaft, and dials on said body concentric with the projeoting ends of the stems numbered to correspond with the clock face, the knobs on said stems being arranged to be turned whereby toset the detent pins in selected positions with relation to the dials.

3. A structure as set forth in claim 1 including means for holding the valve stems against tuming with the gears, whereby to insure movement of the circular flanges of the gears with respect to the detent pins whenthe stems are in set positions.

4. A structure as set forth in claim 1 including means for holding the valve stems against turning with the gears, whereby to insure movement of the circular flanges of the gears with respect to the detent pins when the stems are in set positions, said means being rendered operative when the valves are moved manually to set positions.

5. In a fuel control device, a body having valve means therein for starting and stopping fuel flow through the body by opening and closing of said valve means, a continuously operating clock mechanism, a pair of means controlling the opening and closing of the valve means comprising complementary members having recesses and projections adapted to interfit upon proper registration thereof, the one set of members being rotatably advanced simultaneously by driving connections with the clock mechanism and the other set of members being rotatable manually to selected positions, the recesses and projections being adapted to register at critical first and second time intervals, spring means arranged to open and close the valve means upon registration and interfitt-ing of the projections and recesses, a pair of setting knobs for the manually rotatable members, rotatable to selected positions relative to a pair of clock dials to predetermine the times for opening and closing of the valve means, and

means for holding the valve' means in an open position independently of the clock mechanism.

6. In a fuel control device, a body having valve means therein for starting and stopping fuel flow through the body upon opening and closing of said valve means, a continuously operating clock mechanism, a pair of setting stems having setting knobs on the outer ends thereof for manually rotating said stems, two detent members rotated by means of said stems relative to a pair of clock dials to selected starting and stopping times, two gears concentrically disposed with respect to the rotatable detent members having driving connections with the aforesaid clock mechanism so as to be simultaneously rotatably advanced relative to said detent members, the detent members and gears providing complementary interfittable projections and recesses arranged to inter-engage upon proper registration of the projections and recesses at the selected starting and stopping times, spring means dependent for the operation thereof upon such interengagement for opening and closing said valve means, and means for holding the valve means in an open position independently of the clock mechanism.

'I. In a fuel control device, a body having valve means therein for starting and stopping fuel flow through the body upon opening and closing of said valve means, a continuously operating clock mechanism, a pair of gears having driving connections with the clock mechanism so as to be simultaneously rotatably advanced, a pair of rotatable detent members concentrically arranged with respect to the gears, a pair of clock dials also concentric with respect to said gears, setting knobs for turning said detent members relative to said clock dials to selected starting and stopping times, said detent members and gears providing complementary projections and recesses adapted upon proper registration to interengage, spring means for urgingthe detent members and gears toward interengagement, said spring means being dependent for operation upon such interengagement to open and close the valve means, and means for holding the valve means in an open position independent of the registration of the projections and recesses.

8. In a fuel control device, a body having valve means therein for starting and stopping fuel flow through the body upon opening and closing of said valve means, a continuously operating clock mechanism, a pair of gears having driving connections with the clock mechanism so as to be simultaneously rotatably advanced, a pair of rotatable detent members concentrically arranged with respect to the gears, a pair of clock dials also concentric with respect to said gears, setting knobs for turning said detent members relative to said clock dials to selected starting and stopping times, said detent members and gears providing complementary projections and recesses adapted upon proper registration to interengage, spring means for the double function of urging interengagement of the projections and recesses, and the opening and closing of the valve means dependent upon such interengagement, and means for holding the valve means in an open position independent of the registration of the projections and recesses.

' 9. In a fuel control device, a body having valve means therein for starting and stopping fuel flow through the body upon opening and closing of said valve means, a continuously operating clock mechanism, a pair of setting stems having setting knobs on the outer ends thereof for manually rotating the same, a pair of gears driven by the clock mechanism and concentric with said stems and arranged to turn with respect thereto, the same having hubs concentric with the stems recessed longitudinally,'cooperating radial projections carried on-the stems arranged to engage in the recesses upon registration therewith, coiled springs surrounding the stems and tending normally to urge the projections and hubs toward each other, whereby, to: produce relative axial movement between the gears and stems upon registration of the projections and recesses, and means dependent upon said movement for operating the valve means.

10. In a fuel .control device, a body through which fuel flow is to occur upon opening and closing of valve means therein, a timing mechanism, a pair of setting stems having setting knobs on the outer ends thereof for manually rotating said stems, a pair of gears driven by the timing mechanism and concentric with said stems and arranged to turn with respect thereto, the same having longitudinally recessed hubs concentric therewith, radial projections on the stems ar-- ranged to engage in the recesses in the hubs upon registration therewith, spring means urging the projections and hubs toward each other, whereby to secure axialmovement of the stems relative to the hubs upon registration of the projections and recesses, and valve means carried directly .upon and movable with said stems and disposed in the aforesaid body and arranged to be opened and closed at predetermined times according to the setting of the projections with respect to the recesses.

, JOHN H; GRAYSON. 

